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Effect of composition and thermo-mechanical processing on microstructure development in Ni-30Fe-Nb-C model alloys

Journal Article


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Abstract


  • The unavoidable phase transformation upon cooling makes a direct observation of austenite microstructure impossible. One of the methods to investigate the high temperature condition of austenite is to use a model alloy, which would not transform to martensite on quenching. In the present work the recrystallisation and grain growth of austenite during thermo-mechanical processing (TMP) were studied for three Ni-30Fe-Nb-C alloys containing 0.33, 0.85 and 1.42 wt% Nb. The austenite microstructures were characterised using optical and scanning electron microscopy, and energy dispersive X-ray spectroscopy. The austenite recrystallisation kinetics was investigated with respect to the precipitate distribution variations. A relative strength of the grain boundary pinning effect from solute Nb and precipitated particles is discussed.

Authors


  •   Mannan, Parvez (external author)
  •   Kostryzhev, Andrew (external author)
  •   Pereloma, Elena V.

Publication Date


  • 2014

Citation


  • Mannan, P., Kostryzhev, A. G. & Pereloma, E. V. (2014). Effect of composition and thermo-mechanical processing on microstructure development in Ni-30Fe-Nb-C model alloys. Advanced Materials Research, 922 475-480.

Scopus Eid


  • 2-s2.0-84901502432

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=3964&context=eispapers

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/2955

Number Of Pages


  • 5

Start Page


  • 475

End Page


  • 480

Volume


  • 922

Abstract


  • The unavoidable phase transformation upon cooling makes a direct observation of austenite microstructure impossible. One of the methods to investigate the high temperature condition of austenite is to use a model alloy, which would not transform to martensite on quenching. In the present work the recrystallisation and grain growth of austenite during thermo-mechanical processing (TMP) were studied for three Ni-30Fe-Nb-C alloys containing 0.33, 0.85 and 1.42 wt% Nb. The austenite microstructures were characterised using optical and scanning electron microscopy, and energy dispersive X-ray spectroscopy. The austenite recrystallisation kinetics was investigated with respect to the precipitate distribution variations. A relative strength of the grain boundary pinning effect from solute Nb and precipitated particles is discussed.

Authors


  •   Mannan, Parvez (external author)
  •   Kostryzhev, Andrew (external author)
  •   Pereloma, Elena V.

Publication Date


  • 2014

Citation


  • Mannan, P., Kostryzhev, A. G. & Pereloma, E. V. (2014). Effect of composition and thermo-mechanical processing on microstructure development in Ni-30Fe-Nb-C model alloys. Advanced Materials Research, 922 475-480.

Scopus Eid


  • 2-s2.0-84901502432

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=3964&context=eispapers

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/2955

Number Of Pages


  • 5

Start Page


  • 475

End Page


  • 480

Volume


  • 922